The highest contrast ratio of the LG 29EA73 is 5000000:1. That's over ten times the contrast ratio of the most common dynamic contrast ratio of 500000:1.
A 5000000:1 dynamic contrast ratio is in fact the best contrast ratio across all big screen size PC monitors that have been available for a comparable time to the 29EA73.
The worst contrast ratio across similar types of PC screen is 500000:1.
There are a number of other flatpanel monitors that have a 5000000:1 dynamic contrast ratio currently available that you might want to consider including the 29UM65 ($463.45), the 34UM65 ($898.00), or the 29UB65 all from LG which has a better Rating.